How To Fix CNV_10020603 - Relationship data was divided into &1 blocks (approx. block size is &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 603

• Message text: Relationship data was divided into &1 blocks (approx. block size is &2)

What causes this issue?

Based on the settings stored in the path parameters (transaction
CNV_10020_PARAMP), the relationship data for &V3& &V4& has been divided
into &V1& blocks for the purposes of partial loading. The block size
calculation resulted in an average of &V2& records per block.
&HINTS&
If the cardinality is 1:N or N:M, the source determination values can
have more than one target determination value assigned. Because a block
you want to load must necessarily contain all relationship data for a
source determination value, the actual number of entries in some blocks
may be higher than the calculated block size.
For cluster data, the block size must always be a multiple of the
package size to be filled. If this is not the case, the value is
adapted internally in accordance with this rule.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020603 - Relationship data was divided into &1 blocks (approx. block size is &2) ?

  The SAP error message CNV_10020603 indicates that relationship data has been divided into multiple blocks during a data migration or conversion process. This typically occurs in the context of SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data conversion programs.
  Cause:
  
  Data Volume: The primary cause of this error is the large volume of relationship data being processed. When the data exceeds a certain threshold, the system automatically divides it into blocks to manage memory and processing efficiency.
  Configuration Settings: The configuration settings for data processing may not be optimized for the volume of data being handled.
  Performance Limitations: The system may have performance limitations based on hardware resources, such as memory and processing power, which can lead to data being split into blocks.
  
  Solution:
  
  Increase Block Size: If possible, adjust the configuration settings to increase the block size. This can help reduce the number of blocks created during processing.
  Optimize Data Volume: Review the data being migrated and see if it can be filtered or reduced. This may involve excluding unnecessary records or optimizing the data structure.
  Monitor System Resources: Ensure that the system has adequate resources (CPU, memory) to handle the data processing. Upgrading hardware or optimizing system performance may help.
  Check Migration Settings: Review the settings in the migration tool to ensure they are configured correctly for the data volume you are working with.
  Consult SAP Notes: Check for any relevant SAP Notes or documentation that may provide additional guidance or patches related to this error.
  
  Related Information:
  
  SAP Notes: Look for specific SAP Notes related to the CNV_10020603 error for any updates or fixes provided by SAP.
  Migration Tools Documentation: Review the documentation for the specific migration tool you are using, as it may contain best practices and configuration tips.
  Performance Monitoring: Utilize SAP's performance monitoring tools to analyze the system's performance during the migration process and identify bottlenecks.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.